Generate Key

1. gpg --full-generate-key
2. Select defaults or the required option if you have them
   
3. Select an expiration date
   

4. Enter your personal information (it needs to be consistent with your account info)

5. Use a secure passphrase

Key can be listed with:

gpg --list-secret-keys --keyid-format=long

Key can exported with:

gpg --armor --export <key>

Screenshots: